CONFLICT OF INTEREST STATEMENT This work does not have any conflicts of interest. REFERENCES 1, , , et al.: Recent progress in flexible and stretchable piezoelectric devices for mechanical energy harvesting, sensing and actuation. Extreme Mech. Lett. 9, 269–281 (2016) 2: Dynamic piezoelectric translation devices. Rev. Sci. Instrum. 58(1), 54–57 (1987) 3: Smart material systems. Society for Industrial and Applied Mathematics, Philadelphia (2005) 4, , : A survey of control issues in nanopositioning.